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Flux for refining aluminum and aluminum alloy melts and method for refining aluminum and aluminum alloy melts

A technology of aluminum alloy melt and flux, which is applied in the field of flux for refining aluminum and aluminum alloy melt and in the field of refining aluminum and aluminum alloy melt, which can solve the problem of unsatisfactory refining effect and deterioration, grain refinement, and influence on casting Ingot or casting performance, complex process and other issues, to avoid further oxidation, improve refining effect, enhance the effect of adsorption and dissolution

Active Publication Date: 2018-12-21
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is no heterogeneous nucleation in the melt, it will lead to coarse grains during the solidification process, which will affect the performance of the ingot or casting
In summary, the refining effect, deterioration and grain refinement of existing aluminum and aluminum alloy refining agents are still unsatisfactory, and the process is complicated

Method used

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  • Flux for refining aluminum and aluminum alloy melts and method for refining aluminum and aluminum alloy melts
  • Flux for refining aluminum and aluminum alloy melts and method for refining aluminum and aluminum alloy melts
  • Flux for refining aluminum and aluminum alloy melts and method for refining aluminum and aluminum alloy melts

Examples

Experimental program
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Effect test

preparation example Construction

[0021] The preparation method of the flux for aluminum and aluminum alloy melt refining comprises the following steps:

[0022] S1. Crushing the components of the above-mentioned first flux, and passing through a sieve of 80 to 100 meshes for screening;

[0023] S2. Weigh the screened components by mass percentage, mix and stir for 5-10 minutes, and prepare the dry material mixture of the first flux;

[0024] S3. Heating the dry material mixture of the first flux to 600°C-800°C for melting and dehydration treatment, stirring mechanically for 5-20 minutes, keeping it warm for 20-40 minutes, and obtaining the first flux after cooling;

[0025] S4. Crushing the first flux into particles with a particle diameter of 0.1-1 mm, subpackaging and sealing to obtain a finished product.

[0026] The components of the first flux are prepared in a blending manner, which can completely remove the moisture in the components of the first flux, and make the components of the first flux uniform...

Embodiment 1

[0039] A flux for refining aluminum and aluminum alloy melts, the flux includes a first flux and a second flux. Wherein the composition of the first flux comprises by mass percent: K 3 AlF 6 10%, KCl 40%, MgCl 2 10%, Na 2 CO 3 30%, NaBF 4 10%; wherein the components of the second flux include: Na 2 TiF 6 55%, graphite powder 30%, mixed rare earth metal fluoride 15%.

[0040] The preparation method of the flux used for refining aluminum and aluminum alloy melts includes: preparing the first flux and the second flux respectively, wherein the components of the first flux are weighed according to the mass percentage, and then the components of the first flux are weighed. After preliminary mixing, a uniform dry material mixture of the first flux is prepared; then the dry material mixture of the first flux is placed in a graphite crucible and heated to 650°C for melting, and the molten state of the flux is mechanically stirred for 5 minutes with a tungsten tool. Keep war...

Embodiment 2

[0046] A flux for refining aluminum and aluminum alloy melts, the flux includes a first flux and a second flux. Wherein the first flux comprises by mass percentage: K 3 AlF 6 3%, K 2 AlF 5 10%, KAlF 4 5%, Na 2 AlF 5 2%, NaCl 25%, AlF 3 15%, Na 2 CO 3 35%, KBF 4 5%; Wherein the second flux comprises by mass percentage: Na 2 TiF 6 75%, graphite powder 10%, mixed rare earth metal fluoride 15%.

[0047] The preparation method of the flux used for refining aluminum and aluminum alloy melts includes: separately preparing the first flux and the second flux, wherein the components of the first flux are first broken and passed through 80-mesh sieves respectively. Secondly, weigh according to the mass percentage, preliminarily mix the weighed components, put them in a graphite crucible and heat up to 700°C to melt, use tungsten tools to mechanically stir the first flux in the molten state for 7 minutes, and keep it warm for 30 minutes . Crushing and sieving the cool...

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Abstract

The invention provides a flux for aluminum and aluminum alloy melt refining as well as an aluminum and aluminum alloy melt refining method, and relates to the technical field of aluminum and aluminum alloy melt treatment. The flux comprises a first flux body which comprises the following components in percentage by mass: 10-20% of an alkali metal fluoroaluminate, 20-40% of an alkali metal chloride, 20-40% of an alkali metal carbonate, 5-10% of an alkali metal fluoroborate and 10-20% of a halide used for removing alkali metal, wherein the alkali metal chloride comprises NaCl and / or KCl; the alkali metal carbonate comprises Na2CO3 and / or K2CO3; the alkali metal fluoroborate comprises NaBF4 and / or KBF4; and the alkali metal halide comprises MgCl2 and / or AlF3. According to the aluminum and aluminum alloy melt refining method provided by the invention, the above flux is sprayed into an aluminum and aluminum alloy melt by adopting N2 as a carrier; and the flux can adsorb and dissolve alumina inclusions of the aluminum and aluminum alloy melt, and refine crystal grains.

Description

technical field [0001] The invention relates to the technical field of processing aluminum and aluminum alloy melts, in particular to a flux for refining aluminum and aluminum alloy melts and a method for refining aluminum and aluminum alloy melts. Background technique [0002] During the smelting and casting process of aluminum and aluminum alloys, the dissolved hydrogen atoms in the melt precipitate out and form bubbles when the casting solidifies, resulting in defects in aluminum and aluminum alloy ingots or castings. At the same time, during the smelting process, the melt reacts with the air to form oxides, and being involved in the melt will reduce its purity. If it is not removed in the subsequent production, oxide inclusions will be formed in the ingot or casting, which will affect the performance of the product. . Therefore, in the production of aluminum and aluminum alloys, refining treatment must be carried out to reduce the hydrogen content and remove inclusions....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/06C22C21/00C22B21/06
CPCC22B21/062C22C1/026C22C1/06C22C21/00
Inventor 姜海涛汤昌廷周平张启东阎昭辉李涛郑卓阳陈铁柱康斌霞
Owner SHANDONG NANSHAN ALUMINUM
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